The 2004 Grand Prix of Road America was the eighth round of the 2004 Bridgestone Presented the Champ Car World Series Powered by Ford season, held on August 8, 2004 at Road America in Elkhart Lake, Wisconsin.

Sébastien Bourdais won the pole and Alex Tagliani won the race, his first and only win in his Champ Car/IndyCar career.